Desk attachment for chairs.



H. A. KNOKE. DESK-ATTACHMENT FOR CHAIRS.

APPLICATION FILED DEG-1 1910.

994,410, Patented June 6,1911

A Nrrin) STATES PATENT OFFICE.

' .ER-MAN A. KNOKE, OF CHICAGO, ILLINOIS.

DESI I ATTACHMENT FOR CHAIRS.

Specification of Letters Patent Application filed IDecemlzver 1, 1910.

Patented Juno 6, 1911. I Serial No. 595,009.

To all whomit may concern:

eitizen of the United States, residing at Chi- .cago, 111 the county ofCook and State of Illinois, have invented a new and useful Improvement1n Desk Attachments for Chairs,

. of which the following is a specification.-

My invention relates to an improvement in the class of desks or tableswhich are equipped with means for readily attaching them to chairs andpermittin them, when so attached, to be conveniently adjusted to desiredhei ht and angle and turned outof the way of tibstructing access to orrising from the. chair-seat. .In the accompanying d rawmg, Figure 1 1s abroken perspective view of a chair shown with my improved deviceattached to one of I its arms Fig. 2 is an enlarged broken section ofthe attaching means on line 2, Fig. 1; Fig. 3 is a similar View of thesame on line 3 Fig. 4, and Fig. 4 is a similar, view of the same on line4, Fig. 3; Fig. 5 is an enlarged broken sect-ion of the attaching meanson line 5, Fig. 1, and Fig. 6 is an enlarged view in broken sectionalelevation of the lower jaw port-ion of the attaching means. Y

The table or desk 7 is rigidly fastened at one end of its under side toan arm 8 having its outer end bent to extendat a right-angle andperforated to form abearing 9. An annular head 10 provided withastraight face 11 carries a stem '12 extending from that face to passthrough the bearing 9, andprovided with a pin 13 which extendstransvcrsely through its end-portion for the purpose hereinafterexplained. On the stem confined, between the bearing and the head 10, asleeve 14 having a recess 15 in one end presents a cam-face 18; and thecollar is pro-' vided with a handle 19. The head 10 surrounds a post 20shown in the preferred form of atube thre'aded at its ends for theapplication of a'c'ap 21 to its upper end, as

a finish, and a nut 22 to its lower end. The

lower part of the .post passes througl 'parah' lel perforated ears 23,23 on the hack of a aw 24, having a clamp-screw 25 working in the outerend of its lower arm or member.

The jaw is secured in place by confining it with'the pin 13, with vof arm.

f 1 between the nut 22 and a washerQfi surround- Be it known that I,HERMAN A. KNoKE, a 1 mg the post and engaged by a stop-pin 27 extendingtransverselythrough it. From the back of the jaw extend, parallel witheach other, perforated cars 28, 28, like but at right-angles to the ears23, to serve the purpose herei'nafter described.

\Vith the table 7 on the'post it is releasably clamped thereto bymanipulating the handle to turn the collar 17 for engaging the cain 18the result of tighten ing the collar against the bearing 9 and thelatter against the sleeve 14 to force the ends ofthe recessed face ofthe sleeve against the surface of the post and thereby rigidly supportthe table on the post. The post, with the table upon it and carrying thejaw 24, may be fastened to an arm 29 of a chair 30 by causing the jaw toembrace the chair-arm andfastening it by tightening the clampscrew 25.'ith the table-applied in the manner shown and described, it may, uponturning the handle to release the cam 18 from the pin 13 and thus freethe parts controlled by the of the way of obstructing access to .orrising from the chair-seat and be adjusted to any desired position byraising or lowering it it to any sultable angle on theaxis 12; and whenso adjusted it may be tightened by properly turning the cam-roller l7. v

The provision on therjaw'of the second set perforated cars 28 adapts thedevice to be attached to a chair-leg 31. For that purpose the nut 22 maybe removed to permit the post to be withdrawn from the jaw-ears 23 andinserted through the ears 28, when the jaw is fastened in place byapplying the nut. Thus the jaw is caused to extend at a right-v angle toits first-named relative position, in which it is illustrated in Fig. l,and is thereby adapted to be applied to the leg 31in the mannerdescribed of applying it to a chair- The manipulations for adjusting thetable when thus supported on a chair-leg are the same as those describedfor adjusting it when supported on an arm of a chair.

\Vhat I claim as new and desireto secure lav-Letters Patent, is

"In combination, a desk, an arm secured to thedesk and provided on itsouter end with a bearing, a post, an annular head adjustably confinedonthe post and cam, be swung on the post out having a stem ere tendingthrough said bearing for supporting pin, and supporting means on thepost, for

the desk axially, a sleeve confined on the the purpose set forth.

stem between one side of the bearim and the r Y r 4 post andinterlocking with the po st, a pin HERMAN OIXE' 5- on the stem, a collarrotataoly confined on In presence ofthe stem between said pin andbearing and JOHN VVILsoN,

provided with-a cam-face engaging with said R. A. SCHAEFER.

Copies 01 this patent may be obtained for five cents each, by addressingthe Commissioner of Patents,

' Washington, D. C.

